Table 4.

Correlations among preference quotients (IDS preference quotient in the IDS vs. silence block, ADS preference quotient in the ADS vs. silence block, and IDS preference quotient in the IDS vs. ADS block) for children with cochlear implants in each block and PLS-AC and PLS-EC standard scores at 18 months after cochlear implantation.

Measures	Preference quotient			Language
	IDS vs. silence	ADS vs. silence	IDS vs. ADS	PLS-AC	PLS-EC
Preference quotient
IDS vs. silence	—	.748*	.745*	.648 †	.586
ADS vs. silence		—	.315	.346	.371
IDS vs. ADS			—	.846**	.702 †
Language
PLS-AC				—	.954**
PLS-EC					—

Note. IDS = infant-directed speech; ADS = adult-directed speech; PLS-AC = Preschool Language Scale–Auditory Comprehension; PLS-EC = Preschool Language Scale–Expressive Communication.

^† .5 < p < .10, two-tailed.

^* p < .05, two-tailed.

^** p < .01, two-tailed.